(3JQHjI GdfMd hGOGQI GdefGMd (B/ s - (3GMeO dWai YHOGdSdGes ((3GdbGgQI (B: s (3ecJHI GdGfLdhGdeUQjI , s, 1990)
Keywords: (3GdfMd(B- (3JQHjIs; (3GdefGMds